Granite

Start the Clock

The Question

This document asks the same narrow question asked of marble in Domain 10A: when scientists reproduce processes involved in producing granitic crystalline material under controlled laboratory conditions, how long do those processes take?

Granite is a crystalline igneous rock composed principally of quartz and feldspars with additional minerals. For this investigation, that definition is enough.

The issue here is time.

Start the Clock

Granite and granitic starting materials have been melted, fused, crystallized, and recrystallized experimentally under controlled temperature, pressure and water conditions.

The experiment begins at a known time. The conditions are imposed. The run is stopped at a known time. The resulting minerals and textures are examined.

The reported clocks are measured in hours, days and weeks, not millions or billions of years.

Thirty Hours to About Sixteen Days

Experimental work on natural granitic material has used temperatures of approximately 1010 to 1297 degrees Celsius with runs extending from about thirty hours to sixteen days.

During these experiments researchers directly observed crystallization of minerals from granitic melt. The mineral sequence could be followed as the material crystallized.

Whatever additional history may be required to construct a large natural granite body, the crystallization processes themselves were occurring while a laboratory clock measured hours and days.

Six to Fifty-Six Days

Other experimental granite crystallization studies have used runs of approximately six to fifteen days at temperatures above 800 degrees Celsius and approximately twenty to fifty-six days at lower experimental temperatures.

These experiments are particularly useful because changing temperature, pressure, and water content changes the crystallization behavior while the duration remains directly measurable.

Again, the relevant clock is weeks, not geological eons.

Five Days

A 2025 experimental study provides an especially simple clock.

Researchers used granitic whole-rock material, fused it into hydrous glass under high-pressure and high-temperature conditions and then conducted controlled crystallization experiments.

The crystallization runs lasted five days.

The importance of that number is not that every natural granite body formed in five days. It is that granitic material can be experimentally taken through a controlled crystallization process on a clock measured in days.

Water Changes the Clock

Granite experiments also demonstrate that the conditions matter. Changing water content changes the temperatures and pathways at which granitic material crystallizes.

This reinforces the central method of Pressure Is of the Essence: time is not an independent construction mechanism.

The rate observed depends upon the physical conditions supplied to the material.

The laboratory therefore allows the conditions and the clock to be measured together.

What Has Been Demonstrated

The laboratory has demonstrated melting and crystallization behavior in granitic systems over experimental durations ranging from roughly thirty hours through several weeks.

Minerals characteristic of granitic systems can nucleate and crystallize during these measured runs.

The experimentally reproduced crystallization processes therefore do not intrinsically require millions or billions of years once the necessary conditions are present.

What Has Not Been Demonstrated

These experiments do not establish that an entire natural granite pluton or kilometer-scale intrusive body formed in five days, sixteen days or fifty-six days.

Large natural bodies introduce additional questions: emplacement, heat transfer, cooling, fluid movement, pressure history, magma supply, geometry and scale.

Those are separate clocks.

If they require substantially longer durations, those durations must be established by evidence appropriate to those processes rather than assigned automatically from the age attributed to the finished granite.

Domain 10B Finding

Granite gives us another laboratory clock.

Experimental granitic crystallization has been conducted over approximately thirty hours to sixteen days, six to fifty-six days in other controlled studies, and five days in a recent whole-rock crystallization experiment.

The important granitic crystallization processes can therefore operate on directly observed clocks measured in days and weeks.

This does not establish the construction time of every natural granite body.

It establishes the next scientific question:

If a natural granite body requires vastly more time than the laboratory crystallization process, which additional process requires that time, and what measurement establishes its duration?

That is the distinction Pressure Is of the Essence is investigating.

Research Record

Domain 10B draws upon published experimental studies of natural granite and granitic whole-rock materials under controlled temperature, pressure and water conditions. Reported experimental runs include approximately thirty hours to sixteen days, approximately six to fifty-six days under differing crystallization conditions and a five-day whole-rock crystallization experiment reported in 2025.

These clocks are assigned only to the processes actually reproduced. They are not automatically assigned to the construction of large natural granite bodies.

Produced by The Lilborn Equation Team:

Michael Lilborn-Williams

Thomas Jackson Barnard

Audrey Williams